Warframe

Warframe is a monumental free-to-play looter-shooter and action RPG that has grown over a decade into one of the most content-rich and player-respectful live-service games ever made. Players control the Tenno, ancient warriors who pilot biomechanical Warframes, each with unique powers, in a vast sci-fi solar system. Its ranking is justified by its staggering depth of systems—from parkour-based combat and deep modding to open-world zones, space combat (Railjack), and mech suits (Necramechs)—all earnable through gameplay. Digital Extremes' model is legendary: virtually everything, including premium currency (Platinum), can be traded between players.

It's ideal for players who love cooperative PvE, deep customization, and a satisfying grind with tangible rewards. Compared to Destiny 2, Warframe offers more freedom in movement and build-crafting and a far more generous free model, though its new-player experience is famously overwhelming.